50661565 has 8 divisors (see below), whose sum is σ = 61352280. Its totient is φ = 40156992.

The previous prime is 50661563. The next prime is 50661593. The reversal of 50661565 is 56516605.

It can be written as a sum of positive squares in 4 ways, for example, as 4571044 + 46090521 = 2138^2 + 6789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50661565 - 2¹ = 50661563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50661565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50661563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45934 + ... + 47023.

It is an arithmetic number, because the mean of its divisors is an integer number (7669035).

Almost surely, 2^50661565 is an apocalyptic number.

It is an amenable number.

50661565 is a deficient number, since it is larger than the sum of its proper divisors (10690715).

50661565 is a wasteful number, since it uses less digits than its factorization.

50661565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93071.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 50661565 is about 7117.6937978533. The cubic root of 50661565 is about 370.0208534631.

The spelling of 50661565 in words is "fifty million, six hundred sixty-one thousand, five hundred sixty-five".